Iro - entryway - send help

how do i keep myself from associating a smell with something nasty?
basically, i've been needing to stay up later than usual recently. so i increased my caffeine input. not really a fan of energy drinks but do really like coffee. its gotten so bad that i started taking regular beans and downing them to stay awake. if that wasn't bad enough, lately my shit has begun to smell like coffee. how do i keep myself from subconsciously connecting coffee with literal shit? do i have to switch to energy drinks or give up the beans? i don't want to be a scatman, any advice helps.
serious replies only.